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An undercover police officer was arrested Tuesday after allegedly lying to police about his involvement in the Sept. 29 motorcycle mob and subsequent attack of an SUV driver in New York City.

According to WABC-TV, the undercover officer, 32-year-old Wojciech Braszczok, was charged with riot and criminal mischief.

The veteran detective originally told police he didn't arrive on the scene until after the attack on Alexian Lien took place. However, video viewed by the NYPD told a different story, according to NBC New York and the Daily News.

In the video, the undercover officer can be seen banging on the rear window of the Range Rover, unnamed police sources told NBC.

"It shows him punching the back window," another unnamed source told the Daily News of the new footage reviewed by investigators on Monday. "And then as the camera is moving it catches him maybe throwing a kick at the side of the car."

After Lien was pulled from the SUV by the bikers, the undercover officer is then seen riding away. Lien was then beaten in front of his wife and daughter by the bikers, who had followed the vehicle up the West Side Highway after it clipped one of their fellow cyclists.

The rules for undercover officers when it comes to reporting crimes are often vague:

Undercover officers are required to immediately report being a witness to a crime. Uniformed officers are required to take police action if they see a crime occurring, but the rules are murkier for undercover officers who face blowing their cover, confusing civilians who don't realize the undercover is really a cop and ruining years-long investigations.

"Compromising his identity could compromise all the work he's doing and his safety as well," Michael Palladino, president of the NYPD detectives union, told NBC. "It's very difficult to lead a double life."

Four bikers have been formally charged in the SUV assault so far, and police are seeking at least two other suspects.

According to NBC, as many as five other off-duty police officers may have been riding with the hundreds of motorcyclists at the annual event.